Armature for dynamo-electric machines



(No Model) B. A. EDWARDS.

ARMATURE FOR DYNAMO ELECTRIC MACHINES.

No. 275,169. Patented Apr.3,1883.

UNITED STATES EDGAR A. EDWARDS, OF CINCINNATI, ASSIGNOR TO 0. M. GOTTSOHALL PATENT OFFICE.

TRUSTEE, OF DAYTON, OHIO.

ARMATURE FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 275,169, dated April 3, 1883.

Application filed October 17, 1882.

To all whom it may concern.-

Be it known that I, EDGAR A. EDWARDS, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Armatures ofDynamo- Electric Machines, of which the following is a specification.

The object of my invention is to so construct the armature of a dynamo-electric machine that it will magnetize and demagnetize rapidly, and at the same time provide for complete ventilation.

Another object of my invention is to provide a large area of magnetic surface in proportion to the amount of metal employed in the core, thereby reducing the cost and increasing the efliciency of the armature, all of which will be explained in the description of the accompanying drawings, in which- Figure l is a detailed view of one of the sections forming the core having one bobbin wound. Fig. 2 is an end elevation, showing two bobbins wound. Fig. 3 is a longitudinal section on line mm, Fig. 2, but showing several bobbiusinelevationandsomeinsection. Figs. 4 and 5 show detailed views of the clamps used to hold the wire rings. Fig. 6 is a plan view of the outer edge of one of the rings.

A represents the shaft of the armature; B, spider-arms on one end of the armature, and being duplicated at the opposite end; b, a hub at the center for rigidly attaching the shaft to the spider.

0 represents iron rings, one being used at each end.

0 represents projecting cross-arms, made of soft iron rigidly attached to rings 0. They are preferably made of semicircular form on their outer edge to accommodate the windin The arms extend radially outward and form polar projections and assist in holding the bobbins. The inner ends also serve to hold the wire-bobbins in place on'the inner side of the core.

0 represents radial polar projections of the arms.

D represents the tie-rods extending longi- (No model.)

tudinally from end to end of the armature through arms 0. They are made of wood or other non-conducting material.

E represents aseries of coils of iron wire, preferably line, which are wound in U-shaped bracketsf, which are strung on the rods D a suitable distance apart to form a series of coils, E. The coils are separated from each other, so as to form air-spaces for ventilation and to prevent magnetic contact.

f, Fig. 4, shows a blank of one of the loops before it is bent. The U-shaped bracketsf also form polar projections for the armature. l have also shown the cross-arm c as extending outwardly to serve also as polar projections.

H represents the induction-coils, which are made, wound, and connected to a commutator in any well-known manner.-

The frame of the armature is composed of the spiders B, one being used at each end, the rims or rings O, and the arms 0, with the connecting tie-rods D united therewith, as shown. This frame is one feature of my invention.

I claim-- 1. The frame of an armature, composed substantially of spider-arms B, for connecting the armature to the shaft at each end, in combi-.

nation with the rings 0 and tie-rods D, passing through the 'U-shaped brackets and crossarms 0, as herein set forth.

2. In combination with a series of iron wire ringsforming the core of the armature, the outer solid rings, 0, having the cross-arms c rigidly attached thereto, and tie-rods D, forsupporting the coils E, substantially as herein set forth.

The core of an armature, composed of annular wire rings supported upon the frame by means of U-shaped brackets f, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

- EDGAR A. EDWARDS.

Witnesses:

J NO. E. J oNEs, J. H. OHASJSMITH. 

